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`(No Model.) 2 sheets-sheet 1.

N. LEDUC av A. E. WEEKS.

DUST COLLECTOR.

No. 401.503. Patented Apr. 16, 1889.

Hlllllllll l Attorneys.

(No Model.) 2 Sheets--Sheet 2.

N. LEDUG & A. E. WEEKS DUST GoLLEoToR.

No. 401,503. Patented Apr. 16, 1889.,

WJTJVESSES B, j VEJVTOR,

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. if; './ttorneyf UNITED STATES PATENT OFFICE.

NELSON LEDUO AND ALBERT E. W'EEKS, OF LOOKPORT, NEW' YORK; SAID VEEKS ASSIGNOR TO SAID LEDUO.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 401,503, dated April 16, 1889.

Application filed March 5, 1887. Renewed February 2, 1889. Serial No. 298,518. (No model.)

To all whom it may concern,.-

Be it known that we, NELSON LEDUC and ALBERT E. WEEKS, citizens of the United States of America, residing at Lockport, in the county of Niagara and State of New York,

have invented certain new and useful Improvements in Dust-Collectors, of which the following is a specification, reference being had therein to the accompanying drawings.

1o This invention pertains to certain new and useful improvements in-dust-collectors; and it consists in the detailed construction and combinations of the parts, substantially as hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure l is a view in perspective of our invention with the upper portion or cover raised. Fig. 2 is a vertical transverse sectional view thereof.

2o Fig. 3 is a vertical sectional view on the line .fr oc, Fig. 2.

In carrying out our invention we secure within supporting framing a an approximately V-shaped dust-receiving chamber or 2 5 receptacle, A, the same havingthe upper ends of its side walls secured to horizontal side bars, a', of said framing. To the lower convergent sides of this chamber or receptacle are secured the sides of a box or casing, a2,

3o the same extending from end to end of said chamber or receptacle, the purpose and more minute construction of which will appear farther on. This chamber or receptacle has two similarly-arranged partitions, h b, secured 3 5 a short distance from each other at equal distances from the ends of the machine, thus forming at the center a still-air chamber, B, and two equal-sized compartments, b h, at the ends. These partitions b b have each two 4o eccentric openings, b', formed therein, the purpose of which will also be stated farther on.

O C are two vertical parallel boards or deilectors running lengthwise the machine, the same being secured to the partitions b and 4 5 the ends of the compartments of thefV-shaped chamber or receptacle. These deflectors are so arranged that their lower ends are one within a short distance of the inner surface of one of the inclined sides of the chamber or 5o receptacle and the other directly over the center thereof, a short distance from the opening into the box or casing a2.

XVithin each compartment h is arranged thelower half or sect-ion, (l, of a circular jacket,

D, the same being secured at its ends to the central partition, b, and the end walls of the machine. These halves or sections d are com posed each of a solid piece of metal, d, and an open or slatted portion, d2, as shown in Fig. 2. Before describing the purpose of these jackets and the detailed construction of the parts operating therein reference will rstbe had to the upper portion or cover, E, which is essential to the complete construction of and forms part of our invention. This cover E has semicircular ends, and has projecting from its upper surface to one side thereof on a horizontal line an inlet-trunk, c, extending the entire length of said cover.

In the cover E are secured two partitions, 7o h3 b3, corresponding to the partitions b Z2, and the space formed between said partitions b3 b3 is covered by cross-strips connected to the lower ends thereof. The upper halves or sec tions, e', of theA circular jackets D are con- 75 structed and secured in a manner similar to the lower halves or sections-na1nely, of a piece ofV solid metal, d', and an open or slatted portion, (Z2, secured at their ends to the central partitions, b3 h3, and the end walls of the cover. Both the upper and lower halves or sections of the circular jackets D are arranged so as to form on the top forward side and under surfaces of said jackets continuous passages or ilues ff. The other or rear side of each of said jacl ets--1ia1n.ely, the side composed of solid metal-is closed at its upper and lower ends, respectively, by means of the inlet chute or trunk and a horizontally-disposed partition, f', as seen in Fig. 2. A draftregulating damper, f2, is located within the long inlettrunk, as shown.

The ends of the chamber or receptacle A and the cover E, as well as the upper and lower central partitions, have large s'emicir 95 cular openings E E2 formed therein, the opening E2 of the upper cent-ral partitions, h3 h3, being lined with tin or other metal. v The large circular openings E at each end of the machine, formed bythe cover being closed or roo fitted thereon, have wire screensV g g secured over the same.

G is a central horizontally-disposed shaft extending through the above-described circular openings of the machine and supported by curved brackets g', in the upper outer ends of which are formed ordinary journalboxes, g2, wherein the ends of said shaft are disposed..

H H are two sets of fans, each set being secured by ordinary means to the shaft G, said fans being designed to revolve within the circular jackets D D, through the slotted p0rtions of which jackets the agitated air is forced by said fans into the passage or fiues ff. To one end of this shaft is secured aband-wheel, h, whereby power is transmitted to said shaft, the working of the machine being effected in any known way and in any desired manner. To the other end of this shaft is secured a band-wheel, h, over which passes a drivingbelt, h2, which also encompasses a band-wheel, I, secured upon the outer end of the shaft of a continuous valve, I. The valve I is constructed by cutting or removing portions of a shaft forming cavities i, which when in a registering position form the lower curved end of the V-shaped chamber or receptacle. The ends of the shaft of this valve project through and rest in suitable apertures formed in the end walls of the inclosing-casing, and on the end whereon the band-wheel I is secured is also made fast a gear-wheel, i', between said band-wheel and the casing. This gear-wheel 'i' gears with a similar wheel secured on the projecting end of the shaft of a screw conveyer, J, which, as will be seen by reference to Fig. 2, is disposed in a lower compartment of the box or casing, into which lower compartment opens the upper compartment, wherein is disposed the continuous valve I.

One end of the conveyer box or casing has a small extension, j, lwhich is provided with an opening on its under side, permitting the discharge of dust from said conveyer.

L L are two brushes secured upon the revolving shaft G in such manner as to cause the fibers thereof to bear against the screens g g, and in the revolution of the shaft the brushes will be continuously moving over the inner surfaces of said screens.

The operation of my invention is as follows: The upper portion or cover being first secured in position over the dust-receiving .chamber or receptacle, so as to cause the upper halves or sections of the circular jackets to fit snugly at their meeting edges, the damper in the trunks is arranged so as to regulate the in iiow of the dust-laden air. The dust-laden air, being forced in through the trunk c by a suitable blast, passes along the flues fand down past the deflectors C C', where its maximum portion of dust is deposited in the recess or cavity of valve l. From the lower edges of said 'l deiiectors the air rises to the openings b',

through which it passes into the still-air chamber B, and thence from the top thereof into the fan-chambers through the openings E2. Here the air is given a rotary motion by the fans H, and the remaining dust-particles sharing in such motion are thrown by centrifugal force against the jacket D. Through the slatted portion of this jacket the dust-particles and some air pass into the flues f, where they unite with the current of flowing dust-laden air and share with it the separating action of the deflectors C C. The remainder of the air in the fanchambers, which. is now almost entirely purified, passes out through the screens g, being forced along1 by the pressure of the current entering the trunk e. Whatever dust clings to the screens g is removed by the revolving brushes L. The centrifugal force imparted to the dust-particles by the passage of the dustladen air through the curved flues f tends to throw said particles to the exterior walls of such fines, and so begins the separating action. This centrifugal tendency is aided by the slight air-current issuing from the fanchambers through the slatted jackets, the tangential arrangement of the slats giving to such current a forward as well as a radial motion. The separated dust falls through the bottom of the V-shaped chamber or receptacle into the registering-cavity of the long continuous valve, which, being in motion, by means of the belt 71,2, encircling the band-wheel of its shaft, as before explained, will be caused to revolve and empty the contents of each cavity into the conveyer-casing.

The screw conveyer has motion transmitted thereto by reason of the gear-wheel of the valve-shaft engaging with the similar wheel 011 the shaft of said conveyer. By means of IOO the screw conveyer the dust will be worked or forced toward the discharge end of the box or casing, where it will be discharged through an opening in the partition wherein the end of the conveyer-shaft rests, and from this point can be conducted in any manner by a pipe or chute to the outside of the building.

From what has been stated it will be seen that by means of our invention the separation of the dust from the air is readilyeffected by mechanism simple in its construction and arrangement, and the parts are not liable to get out of order or to become disarranged. It will also be observed that by means of the damper in the trunk the draft can be regulated as may be desired.

Having thus fully described our invention, what we claim, and desire to secure by Letters Patent, ism

l. The herein-described dust-collector, consisting of the V-shaped chamber or receptacle, the still-air chamber having openings in its side walls, the continuous valve andthe IIO inclosing box or casing therefor, the deflectors, the shaft having fans, lthe cover provided with trunks, the screen-covered openings, the circular slatted jackets, and the gearing and IOO driving` Wheels, the Whole arranged tO Operate substantiallyas shown and described, and for the purpose specified.

2. The combination, With the chamber Or receptacle and the cover having openings at the ends, of the still-air chamber having Openings in its side Walls, the deflectors, the cir* cular slatted jackets, and the fans, substantially as shown and described.

3. The combination, With the chamber or receptacle provided With openings at the ends and the cover, of the circular jackets secured therein having slatted and closed portions, the Operating-fans inclosed in said jackets, and the still-air chamber having Openings in its side Walls, substantially as shown and described.

NELSON LEDUO. ALBERT E. WEEKS.

Witnesses:

LEWIS P. GORDON, LAWRENCE J. MOPARLIN. 

